clean jets and check fuel filter
My Yamaha Blaster stalls when I engage the throttle, what should I do?
Boring the engine out will not help the top end speed. This Blaster will go at top end 55 mph at the full throttle.
May be a vacuum leak
take negative off battery for 30 minutes and clean the Throttle Body
Try the throttle position sensor
Must be a wallabee in the carbureator.
Most likely a Throttle position sensor
it might be your throttle
throttle positioning sensor, egr, idle air control
This is a dirty throttle body. Very common on our trucks.
if its a manual then it could be three things, clutch cable or throttle cable, or IAC (idle air control valve) but if its an automatic it could be throttle cable or IAC.
Have you changed the main jet? Sounds like needle not seating fully or correctly.